How is a closed access lane typically indicated?

A closed access lane is typically indicated with a red X above the lane. This visual cue is important for drivers to understand that the lane is not accessible, generally due to ongoing construction, an accident, or other emergency situations. The red X serves as a universal sign that clearly communicates a "do not enter" message, making it a crucial component of road safety and the efficient movement of emergency vehicles.

Using a red X is effective because it stands out prominently, capturing the attention of drivers and guiding their decisions about lane usage. In contrast, other methods such as red circle signs, cone placements, and flashing lights may not convey the same immediate and clear directive regarding lane closure, making the red X the most reliable indicator in this context.